Kohsan is a district of Herat province in northwestern Afghanistan.

The population of Kosan District is 52,900 (as of 2012),[1] which includes the following ethnic groups: 59.4% Pashtun, 35.3% Tajik, 5.1% Balouch, and 0.2% Turkmen.

The district is located about 116 kilometres (3 hours drive) west of Herat city and is mainly a desert, with patches of irrigated lands.

Islam Qala, one of the official border crossings between Afghanistan and Iran, is located in this district.

This Herat Province, Afghanistan location article is a stub.